An organic-inorganic hybrid silica aerogel prepared by co-precursor method for solid-phase microextraction coating

Tian, Yu; Feng, Juanjuan; Wang, Xiuqin; Luo, Chuannan; Loussala, Herman Maloko; Sun, Min

doi:10.1016/j.talanta.2018.10.056

Cited by 30 publications

(9 citation statements)

References 48 publications

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“…Recently, many types of SPME fiber coatings have been developed, such as polymer , carbon , and inorganic materials as well as nanomaterials . The poor thermal and chemical stability of organic materials are not conducive to the direct or indirect SPME injection technology because of their short service life.…”

Section: Introductionmentioning

confidence: 99%

Durable molybdenum oxide coated solid‐phase microextraction fiber for highly selective and efficient extraction of polycyclic aromatic hydrocarbons in water

Wang

Fan

et al. 2019

J of Separation Science

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A bonding method was developed for coating molybdenum oxides onto a steel wire substrate, which was used as a solid‐phase microextraction fiber, was coupled with gas chromatography. Based on the characterization, it is found that the as‐prepared molybdenum oxides material contained a nanobelt structure with a uniform size and good dispersibility. In addition, there were a large number of small protrusions on the surface of the nanobelts. These characteristics provided a large specific surface area for extraction. Molybdenum oxides exhibited a high extraction selectivity for polycyclic aromatic hydrocarbons owing to its moderate coordination. After the optimization of the factors, method detection limits of < 1.25 μg/L were achieved, and the calibration curves were linear within the range of 2–600 μg/L. In addition, repeatability was demonstrated, and the relative standard deviation < 6.4%. The molybdenum oxides coating had a high scratch resistance, which could effectively prevent coating wear and failure. Combined with the high thermal and chemical stability, the service life of the coating was improved and could be used 150 times without a significant reduction in the extraction performance. Finally, the as‐prepared fiber had a comparable extraction capacity and higher partition coefficients that those of commercial polyacrylate fibers.

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Section: Introductionmentioning

confidence: 99%

Durable molybdenum oxide coated solid‐phase microextraction fiber for highly selective and efficient extraction of polycyclic aromatic hydrocarbons in water

Wang

Fan

et al. 2019

J of Separation Science

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“…Two strategies have been explored: the construction of an organic-inorganic hybrid gel skeleton [19,20] and the introduction of reinforcing materials in the gel skeleton to produce a composite aerogel [21,22]. Hybrid gel skeleton construction involves the synthesis of a special precursor with a flexible group or chain segment through an innovative organic reaction, followed by the sol-gel process [23,24]. The precursor is expensive and increases the cost of the aerogel.…”

Section: Introductionmentioning

confidence: 99%

Robust Silica-Cellulose Composite Aerogels with a Nanoscale Interpenetrating Network Structure Prepared Using a Streamlined Process

et al. 2020

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Silica aerogels can be strengthened by forming a nanoscale interpenetrating network (IPN) comprising a silica gel skeleton and a cellulose nanofiber network. Previous studies have demonstrated the effectiveness of this method for improving the mechanical properties and drying of aerogels. However, the preparation process is generally tedious and time-consuming. This study aims to streamline the preparation process of these composite aerogels. Silica alcosols were directly diffused into cellulose wet gels with loose, web-like microstructures, and an IPN structure was gradually formed by regulating the gelation rate. Supercritical CO2 drying followed to obtain composite aerogels. The mechanical properties were further enhanced by a simple secondary regulation process that increased the quantity of bacterial cellulose (BC) nanofibers per unit volume of the matrix. This led to the production of aerogels with excellent bendability and a high tensile strength. A maximum breaking stress and tensile modulus of 3.06 MPa and 46.07 MPa, respectively, were achieved. This method can be implemented to produce robust and bendable silica-based composite aerogels (CAs).

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“…Silica aerogels , graphene aerogels , and carbon aerogels were developed for SPME or SPE. Our group prepared an organic hybrid silica aerogel and an ionic liquid‐functionalized silica aerogel as the coatings for fiber SPME, and also produced melamine–formaldehyde aerogel , ionic liquid modified melamine–formaldehyde aerogel , and organic–inorganic hybrid silica aerogel for in‐tube SPME sorbents. Resorcinol–formaldehyde aerogel is a typical organic aerogel that owns more superiority than inorganic aerogel, like as high mechanical strength, good stability in acid or basic conditions, and more porous.…”

Section: Introductionmentioning

confidence: 99%

Resorcinol–formaldehyde aerogel coating for in‐tube solid‐phase microextraction of estrogens

Jiang

Sun

2020

J of Separation Science

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Resorcinol-formaldehyde aerogel coating was in situ prepared on the surface of basalt fibers. The aerogel coating is uniformly modified onto basalt fibers, and it is very porous according to the characterization by using scanning electron microscopy. An extraction tube was prepared for in-tube solid-phase microextraction by placing the aerogel-coated basalt fibers into a polyetheretherketone tube. To evaluate the extraction performance toward five estrogenic compounds, the tube was connected with high performance liquid chromatography, the important extraction and desorption conditions were investigated. An online analytical method for detection of estrogens was developed and presented low limits of detection (0.005-0.030 µg/L), wide linear ranges (0.017-20, 0.033-20, and 0.099-20 µg/L), good linearity (r > 0.9990), and satisfactory repeatability (relative standard deviation < 2.7%). The method was successfully applied to detect trace estrogens in real water samples (bottled pure water and bottled mineral water), satisfactory recoveries were ranged from 80 to 125% with two spiking levels of 2 and 6 µg/L. K E Y W O R D Saerogels, estrogens, high performance liquid chromatography, online analysis, solid-phase microextraction

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An organic-inorganic hybrid silica aerogel prepared by co-precursor method for solid-phase microextraction coating

Cited by 30 publications

References 48 publications

Durable molybdenum oxide coated solid‐phase microextraction fiber for highly selective and efficient extraction of polycyclic aromatic hydrocarbons in water

Durable molybdenum oxide coated solid‐phase microextraction fiber for highly selective and efficient extraction of polycyclic aromatic hydrocarbons in water

Robust Silica-Cellulose Composite Aerogels with a Nanoscale Interpenetrating Network Structure Prepared Using a Streamlined Process

Resorcinol–formaldehyde aerogel coating for in‐tube solid‐phase microextraction of estrogens

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